"You are misinformed."
While lay persons may participate in the process, the final determination is made solely by the church. Having studied some of the accepted "miraculous" cures, it's interesting to note that the original diagnosis is often not fully supported by medical tests. Did this nun have Parkinson's or, perhaps, one of the many other medical conditions that have similar symptoms? How was this tested?
Please pardon my skepticism, it comes naturally to me.
And you would expect it wouldn't?
This is known in the debating trade as a half-truth. The final decision is made by church officials but on the basis of the expert medical opinion.
Your original claim, as I recall, was that the process was "wholly" within the Church. You did a bait and switch here.